Perhaps you should try some spelling variations:
demands during » remarks during
water demands » water demand
zhang bank » zhang fan, zhang yan, zhang fang
li zhang » _ zhang
bank run » bank runs
bonn am » bonn zum, bonn ana, bonn auf
bonn a » bonn _, bon a, bonn 1
von a » von h, von i, von f

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: li zhang bank run water demands during ((von a) OR (((bonn a) OR (bonn am)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "li zhang bank run water demands during ((von a) or (((bonn a) OR (bonn am)))) ;~".
• Adding a wildcard symbol may retrieve word variants: li zhang bank run water demands during ((von a) or (((bonn a) OR (bonn am)))) ;*.